Reply by Mike Monett VE3BTI●September 12, 20232023-09-12
Mike Monett VE3BTI <spamme@not.com> wrote:
> I'm going to experiment with uploading ASC and PLT files directly. If I
> can get Google Drive to stop using one of its editors and wrapping the
> lines, then it should work.
It works!
I gave it gibberish extentions that it doesn't know what to do with. Just
move the last letter in the extension to the first place.
ASC = CAS
PLT = TPL
Here's the files:
https://tinyurl.com/mr32zynw
- cas
https://tinyurl.com/upr8yeap
- tpl
No unzipping, no editing, no line wrap, just rename and go.
--
MRM
Reply by Mike Monett VE3BTI●September 12, 20232023-09-12
piglet <erichpwagner@hotmail.com> wrote:
>
> Problem solved! During line wrap demangling I had corrupted the 1N4007
> model Ibv=10u to become bv=10u so the extraordinary diode currents in my
> sim were it breaking down at microvolts. Now it sims more like you saw.
>
> piglet
I once tried to bypass the line wrap by zipping the files and uploading to
Google Drive. But I got so many complaints that people could not unzip them
that I gave up.
Now, after having good experience with bare unzipped files, I may try
again.
As a favor, try this and see how it works:
https://tinyurl.com/r6r2m9kc
It will say "No Preview Available", but give you the opportunity to
download the file. Do so, and separate the files into ASC and PLT.
Now, any wrap will happen in your text editor. Set the line width to the
maximum and you should have no trouble.
I'm going to experiment with uploading ASC and PLT files directly. If I can
get Google Drive to stop using one of its editors and wrapping the lines,
then it should work.
--
MRM
Reply by John Larkin●September 11, 20232023-09-11
On Mon, 11 Sep 2023 14:14:38 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>On 2023-09-11 14:08, John Larkin wrote:
>> On Mon, 11 Sep 2023 12:33:29 -0400, Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> On 2023-09-09 05:42, upsidedown@downunder.com wrote:
>>>> On Fri, 8 Sep 2023 08:10:41 -0000 (UTC), Mike Monett VE3BTI
>>>> <spamme@not.com> wrote:
>>>>
>>>>>
>>>>> Note the 1N4007 diodes are replaced by a regular bridge rectifier with
>>>>> suitable ratings. It is easier to model using 1N4007s than trying to find a
>>>>> bridge rectifier in LTspice.
>>>>
>>>> The 1N4007 works more like a PIN diode, the other 1N400x diodes are
>>>> normal diodes.
>>>>
>>> IIRC it's 1N4005 and up that are PIN structures.
>>>
>>> Cheers
>>>
>>> Phil Hobbs
>>
>> The higher voltage rectifiers often make great drift-step-recovery
>> (Grehkov) diodes.
>>
>> 2KV negative pulse:
>>
>> https://www.dropbox.com/s/q82toc257fv43z8/DSRD_neg-2KV.JPG?raw=1
>>
>
>I'm impressed that it survived enough pulses for a full trace. ;)
>
>Cheers
>
>Phil Hobbs
The rep-rate was low, with about 50 amps forward and reverse current
into the DSRD.
Hers's a water-cooled Pockels Cell driver.
https://www.dropbox.com/scl/fi/5arhyamrp0bl3tgb2fasn/DSC02771.JPG?rlkey=3ttcc2yt6s9nrtdouuv3aneol&raw=1
The big problem was inductors. I kept frying them when I was making
1200 volt pulses at 4 MHz. Skin effect and such.
What worked was that air-core inductor, hand-wound on a selected
Sharpie, with a gap-pad to conduct heat through the board to the
water-cooled baseplate below.
Reply by Phil Hobbs●September 11, 20232023-09-11
On 2023-09-11 14:08, John Larkin wrote:
> On Mon, 11 Sep 2023 12:33:29 -0400, Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> On 2023-09-09 05:42, upsidedown@downunder.com wrote:
>>> On Fri, 8 Sep 2023 08:10:41 -0000 (UTC), Mike Monett VE3BTI
>>> <spamme@not.com> wrote:
>>>
>>>>
>>>> Note the 1N4007 diodes are replaced by a regular bridge rectifier with
>>>> suitable ratings. It is easier to model using 1N4007s than trying to find a
>>>> bridge rectifier in LTspice.
>>>
>>> The 1N4007 works more like a PIN diode, the other 1N400x diodes are
>>> normal diodes.
>>>
>> IIRC it's 1N4005 and up that are PIN structures.
>>
>> Cheers
>>
>> Phil Hobbs
>
> The higher voltage rectifiers often make great drift-step-recovery
> (Grehkov) diodes.
>
> 2KV negative pulse:
>
> https://www.dropbox.com/s/q82toc257fv43z8/DSRD_neg-2KV.JPG?raw=1
>
I'm impressed that it survived enough pulses for a full trace. ;)
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.nethttp://hobbs-eo.com
Reply by John Larkin●September 11, 20232023-09-11
On Mon, 11 Sep 2023 12:33:29 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>On 2023-09-09 05:42, upsidedown@downunder.com wrote:
>> On Fri, 8 Sep 2023 08:10:41 -0000 (UTC), Mike Monett VE3BTI
>> <spamme@not.com> wrote:
>>
>>>
>>> Note the 1N4007 diodes are replaced by a regular bridge rectifier with
>>> suitable ratings. It is easier to model using 1N4007s than trying to find a
>>> bridge rectifier in LTspice.
>>
>> The 1N4007 works more like a PIN diode, the other 1N400x diodes are
>> normal diodes.
>>
>IIRC it's 1N4005 and up that are PIN structures.
>
>Cheers
>
>Phil Hobbs
> piglet <erichpwagner@hotmail.com> wrote:
>
>>
>> The model you used for 1N4007 has something very wrong - if I replace
>> with one of the 600V types included with LTSpice then the crazy currents
>> disappear and the circuit does more as you describe. Have you checked
>> Pdiss in R4?
>>
>> piglet
>
> VII doesn't have the 1N4007, so I got the model from LTspice IV. It shows a
> PIV of 1,500 v. There are no 600 V versions in IV.
>
> I see no crazy currents in IV or VII. Can you tell me more about what you are
> seeing?
>
> I tried to plot the power in R4 but had no luck in IV or VII. I tried to
> calculate pwr(V(x), V(a)) but got 9.65e+307 with no units. So I have to
> guess. I'll try a 2W wirewound.
>
>
>
Problem solved! During line wrap demangling I had corrupted the 1N4007
model Ibv=10u to become bv=10u so the extraordinary diode currents in my
sim were it breaking down at microvolts. Now it sims more like you saw.
piglet
Reply by Phil Hobbs●September 11, 20232023-09-11
On 2023-09-09 05:42, upsidedown@downunder.com wrote:
> On Fri, 8 Sep 2023 08:10:41 -0000 (UTC), Mike Monett VE3BTI
> <spamme@not.com> wrote:
>
>>
>> Note the 1N4007 diodes are replaced by a regular bridge rectifier with
>> suitable ratings. It is easier to model using 1N4007s than trying to find a
>> bridge rectifier in LTspice.
>
> The 1N4007 works more like a PIN diode, the other 1N400x diodes are
> normal diodes.
>
IIRC it's 1N4005 and up that are PIN structures.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.nethttp://hobbs-eo.com
Reply by Don Y●September 11, 20232023-09-11
On 9/11/2023 3:45 AM, Martin Brown wrote:
> On 11/09/2023 10:13, albert wrote:
>> In article <87d7569f-932b-4430-a34c-858307af260bn@googlegroups.com>,
>> Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:
>>>
>>> derating also significantly increases efficiency, at the cost of
>>> needing more leds for the same light output
>>
>> No it is not, as long as efficiency means lumens/watt.
>> Two times as many leds cost two times as much obviously, but
>> the leds components are dirt cheap and vanish completely with
>> the price of total energy consumption.
>
> Unfortunately consumers look at the headline initial price to buy and ignore
> the running costs. That means that the cheapest and nastiest ones sell in the
> greatest quantities even if they are less reliable.
Here, the electric utility subsidizes the purchase of "energy efficient"
lighting (often completely covering the cost). So, you are left with
THEIR notion of "what's best"...
Reply by Lasse Langwadt Christensen●September 11, 20232023-09-11
mandag den 11. september 2023 kl. 12.45.11 UTC+2 skrev Martin Brown:
> On 11/09/2023 10:13, albert wrote:
> > In article <87d7569f-932b-4430...@googlegroups.com>,
> > Lasse Langwadt Christensen <lang...@fonz.dk> wrote:
> >>
> >> derating also significantly increases efficiency, at the cost of
> >> needing more leds for the same light output
> >
> > No it is not, as long as efficiency means lumens/watt.
> > Two times as many leds cost two times as much obviously, but
> > the leds components are dirt cheap and vanish completely with
> > the price of total energy consumption.
> Unfortunately consumers look at the headline initial price to buy and
> ignore the running costs. That means that the cheapest and nastiest ones
> sell in the greatest quantities even if they are less reliable.
>
Dubia had Philips design LED bulbs using 2-3x as many LEDs to increase efficiency and life and madated that the only allowed type of bulb
aka. Dubai lamp
Reply by Martin Brown●September 11, 20232023-09-11
On 11/09/2023 10:13, albert wrote:
> In article <87d7569f-932b-4430-a34c-858307af260bn@googlegroups.com>,
> Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:
>>
>> derating also significantly increases efficiency, at the cost of
>> needing more leds for the same light output
>
> No it is not, as long as efficiency means lumens/watt.
> Two times as many leds cost two times as much obviously, but
> the leds components are dirt cheap and vanish completely with
> the price of total energy consumption.
Unfortunately consumers look at the headline initial price to buy and
ignore the running costs. That means that the cheapest and nastiest ones
sell in the greatest quantities even if they are less reliable.
--
Martin Brown